JP7195213B2 - field work machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a field working machine having a plurality of seedling planting mechanisms capable of planting seedlings in a field.

For example, Patent Literature 1 discloses a seedling planting mechanism ("seedling planting device" in the document) of a riding-type rice transplanter. Among the seedling planting mechanisms, the planting arm ("planting nail support case" in the literature) capable of planting seedlings in the field has a storage space ("drive system interior space" in the literature) that can be filled with lubricant. have A grease nipple and a plug are provided on the planting arm, and the plug is screwed into an opening/closing part that opens outside the planting arm in the case of the planting arm.

JP 2015-173663 A

When an operator injects a lubricant from a grease nipple, the operator generally opens the stopper and injects the lubricant while checking the level of the lubricant in the storage space from the opening and closing part of the planting arm. . However, since the riding-type rice transplanter has a plurality of seedling planting mechanisms, maintenance of the plugs and the entire planting arm is required when attaching and detaching the plugs are performed in each of the plurality of seedling planting mechanisms. becomes annoying.

In order to avoid such inconveniences, according to Patent Document 1, when a worker injects a lubricant from a grease nipple, the opening and closing portion and the plug body are separated due to an increase in the internal pressure of the storage space in the planting arm. Lubricant leaks out from a small gap at the threaded portion. This avoids the danger of overfilling the reservoir space in the planting arm with lubricant. However, according to Patent Literature 1, no partition member ("sealing material" in the literature) is interposed between the opening and closing portion and the stopper in the case of the planting arm. In this configuration, since an oil film of a lubricant always exists at the threaded portion between the opening and closing portion and the plug, the stopper is attached to the opening and closing portion in order to prevent loosening of the plug caused by the oil film. It is necessary to retighten with a considerable tightening torque, and the operator needs to pay considerable attention to the maintenance of the plug. On the other hand, the plug has a role of releasing the lubricant in the storage space to the outside, but if this role is shared by other members of the planting arm, it will be advantageous in terms of cost and maintainability. improve.

SUMMARY OF THE INVENTION An object of the present invention is to provide a field work machine having a seedling planting mechanism that facilitates maintenance of the lubricant.

A field working machine according to the present invention is a field working machine having a plurality of seedling planting mechanisms capable of planting seedlings in a field, wherein each of the seedling planting mechanisms has a storage space capable of storing a lubricant therein. a partition member that is provided in a gap opening outside the seedling planting mechanism in the storage space and that is capable of preventing leakage of the lubricant from the storage space; and a relief portion that allows the lubricant to escape to the outside of the seedling planting mechanism, and the seedling planting mechanism has a rotation axis at the center in the longitudinal direction and rotates around the axis in the lateral direction of the machine body. and a planting arm provided at a longitudinal end of the rotating case and capable of planting seedlings in a field, wherein the gap is formed between the rotating case and the planting arm. It is characterized by being a connection point where is connected .

According to the present invention, the lubricant can escape to the outside of the seedling planting mechanism from the partition member through the escape portion while the gap opening to the outside of the seedling planting mechanism is filled with the partition member. ing. Therefore, depending on the combination of the partition member and the escaping portion, it is possible to prevent the lubricant from leaking from the partition member as necessary, and to allow the lubricant to escape from the partition member via the escaping portion as necessary. It becomes possible. As a result, there is no need to remove the partition member or the like when filling the lubricant, and the maintainability of the seedling planting mechanism is improved. As a result, a field working machine having a seedling planting mechanism that facilitates maintenance of the lubricant is realized. In addition, with this configuration, since the connecting portion where the rotating case and the planting arm are connected is the gap portion, the relief portion is provided in the gap portion at the connecting portion. In other words, since the joint between the rotating case and the planting arm is also used as a relief portion, it is advantageous in terms of cost.

In the present invention, a supply port capable of supplying the lubricant to the storage space is provided, and when the lubricant is supplied from the supply port and the lubricant is pressurized, the lubricant is supplied to the partition member. It is preferable that the agent can be guided to the release portion.

With this configuration, when the lubricant is excessively filled in the storage space, the lubricant can be guided to the escape portion by the partition member, so there is a risk that the lubricant may be excessively filled in the storage space. is preferably avoided.

In the present invention, the connecting part has a spigot structure in which the rotating case and the planting arm are engaged, and the relief part is one or both of the rotating case and the planting arm in the spigot structure. It is preferable that both of them are formed in a portion that is surface-processed into a notch shape.

With this configuration, since the joint between the rotating case and the planting arm is engaged by the spigot structure, the accuracy of assembling the rotating case and the planting arm at the joint is improved. Furthermore, a notch-shaped surface-processed portion is formed in this spigot structure, and this notch-shaped surface-processed portion is used as a relief portion, so when releasing the lubricant to the outside of the seedling planting mechanism In addition, it is possible to construct a structure in which the lubricant positively escapes from the notch-shaped surface-processed portion. In addition, according to this configuration, the path for the lubricant to escape to the outside of the seedling planting mechanism is limited to the cutout-shaped escape portion, so that the partition member allows the lubricant to escape in the middle of the cutout-shaped escape portion as necessary. A damming configuration is also easily possible. This improves maintainability of the escape portion.

In the present invention, it is preferable that the relief portion is formed above the vertical central portion of the connecting portion.

Since the seedling planting mechanism is often positioned below the operator's viewpoint, this configuration makes it easier for the operator to check the lubricant coming out of the escape section to the outside of the storage space. Become.

In the present invention, it is preferable that the rotating case and the planting arm are connected by a connecting bolt at the connecting point, and the relief portion is located on the opposite side of the connecting point from the side on which the connecting bolt is positioned. .

With this configuration, the relief portion is located on the opposite side of the connecting portion to the side on which the connecting bolt is located, thereby reducing the risk of the lubricant adhering to the connecting bolt. As a result, the risk of loosening of the connecting bolt due to the friction-reducing action of the lubricant is greatly reduced.

In the present invention, it is preferable that the partition member and the escape portion are provided in the rotary case.

This configuration facilitates the filling of the rotating case with the lubricant.

In the present invention, it is preferable that the partition member and the escape portion are provided on the planting arm.

This arrangement facilitates filling the planting arm with lubricant.

In the present invention, the lubricant is preferably lubricating oil. Also, the lubricant is suitable even if it is a lubricating oil. Further, it is preferred that the lubricant for the rotating case is lubricating oil and the lubricant for the planting arm is grease.

Grease and lubricating oil often have different viscosities. With this configuration, a lubricant having a suitable viscosity can be selected according to the rotating case and the planting arm.

A field working machine according to the present invention is a field working machine having a plurality of seedling planting mechanisms capable of planting seedlings in a field, wherein each of the seedling planting mechanisms has a storage space capable of storing a lubricant therein. an oil seal provided at a gap opening outwardly of the seedling planting mechanism in the storage space and capable of preventing leakage of the lubricant from the storage space; and from the gap through the oil seal. and a release portion capable of releasing the lubricant to the outside of the seedling planting mechanism.

According to the present invention, the lubricant can escape to the outside of the seedling planting mechanism from the partition member through the escape portion while the gap opening to the outside of the seedling planting mechanism is filled with the partition member. ing. Therefore, depending on the combination of the partition member and the escaping portion, it is possible to prevent the lubricant from leaking from the partition member as necessary, and to allow the lubricant to escape from the partition member via the escaping portion as necessary. It becomes possible. As a result, there is no need to remove the partition member or the like when filling the lubricant, and the maintainability of the seedling planting mechanism is improved. As a result, a field working machine having a seedling planting mechanism that facilitates maintenance of the lubricant is realized. In addition, with this configuration, the partition member can prevent the lubricant from leaking out of the storage space, and can guide the lubricant to the release portion as necessary.

It is the whole rice transplanter side view. It is the whole rice transplanter top view. Fig. 3 is a transverse cross-sectional view of the rotating case and planting arm; It is a vertical cross-sectional view of a rotating case. Fig. 3 is a vertical cross-sectional view of a planting arm; Fig. 3 is a cross-sectional view of the machine body front-rear direction showing a connecting portion between the rotating case and the planting arm; FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 6, showing a connection point between the rotating case and the planting arm; Fig. 10 is a cross-sectional view of the machine body front-rear direction showing a relief portion at a connecting portion between the rotating case and the planting arm; FIG. 10 is a transverse cross-sectional view of a rotating case and planting arm in another embodiment;

[Basic configuration of field work machine]
An embodiment of the present invention will be described based on the drawings. Here, a ride-on type rice transplanter will be described as an example of the field working machine of the present invention. As shown in FIGS. 1 and 2, in this embodiment, the arrow (F) is the front side of the traveling body 1, the arrow (B) is the rear side of the traveling body 1, and the arrow (L) is The left side of the running body 1 is the right side of the running body 1 and the arrow (R) is the right side of the running body 1 .

The riding type rice transplanter includes a traveling body 1 having a pair of left and right steering wheels 2 and a pair of left and right rear wheels 3, and an eight-row seedling planting device W as a work device capable of planting seedlings in a field. and is provided. A pair of left and right steering wheels 2 are provided on the front side of the traveling body 1 so that the direction of the traveling body 1 can be freely changed, and a pair of left and right rear wheels 3 are provided on the rear side of the traveling body 1. It is The seedling planting device W is connected to the rear end of the traveling machine body 1 so as to be vertically movable via a link mechanism 5 which is moved vertically by extension and contraction of a hydraulic cylinder 4 for vertical movement.

A front part of the traveling machine body 1 is provided with an openable bonnet 6. - 特許庁A rod-shaped center mascot 7 is provided at the tip of the bonnet 6 as a reference for traveling along index lines (not shown) drawn on the field by markers (not shown). The traveling body 1 is provided with a body frame 1F extending along the front-rear direction, and a support strut frame 8 is erected on the front part of the body frame 1F.

An engine E is provided inside the bonnet 6 . Although not described in detail, the power of the engine E is transmitted to the steered wheels 2 and the rear wheels 3 via a transmission provided in the machine body, and the power after shifting is transmitted to an electric motor-driven plant clutch (not shown). is transmitted to the seedling planting device W via.

An eight-row type seedling planting device W is provided with four transmission cases 10, eight seedling planting mechanisms 11, a ground leveling float 12, a seedling platform 13, and a ground leveling rotor 14. . The seedling planting mechanism 11 is rotatably supported on the rear left and right sides of each transmission case 10 . Each seedling planting mechanism 11 has a rotating case 11A and a planting arm 11B. A pair of rotary planting arms 11B, 11B are provided at both longitudinal ends of each rotary case 11A. Each of the planting arms 11B, 11B is configured to be able to plant seedlings in a field. The seedling planting apparatus W includes a plurality of ground leveling floats 12 which ground and follow the surface of the field to level the surface of the field. Mat-like seedlings for planting are placed on the seedling placing table 13. - 特許庁

The seedling planting device W rotates each rotary case 11A by driving the power transmitted from the transmission case 10 while driving the seedling mounting base 13 to reciprocate and laterally feed the seedling mounting base 13 to the left and right. Seedlings are alternately taken out by the arm 11B and planted on the surface of the field.
The seedling planting mechanism 11 is configured to plant seedlings by planting arms 11B provided on a plurality of rotating cases 11A. When there are four seedling planting mechanisms 11, it is a four-row planting type, when there are six seedling planting mechanisms 11, it is a six-row planting type, and when there are eight seedling planting mechanisms 11, it is an eight-row planting type. , when ten seedling planting mechanisms 11 are used, it is a ten-row planting type.

Two spare seedling stands 16 are provided on the left and right sides of the bonnet 6 of the traveling machine body 1. - 特許庁The spare seedling stand 16 is configured as a rail type on which spare seedlings for replenishing the seedling planting device W can be placed. A pair of left and right spare seedling frames 17 as tall frame members for supporting a spare seedling stand 16 are provided on the left and right sides of the bonnet 6 of the traveling body 1, and the upper parts of the left and right spare seedling frames 17 are connected to each other. 18 is connected.

A riding section 20 for performing various driving operations is provided in the central portion of the traveling body 1 . The riding section 20 is provided with a driver's seat 21 , a steering handle 22 , a main shift lever 23 and an operating lever 24 . A driver's seat 21 is provided in the central portion of the traveling body 1 and is configured so that a passenger can sit thereon. The steering handle 22 is configured such that the steering wheel 2 can be steered manually. The main shift lever 23 is configured to be capable of switching between forward and backward travel and changing the travel speed. Elevating operation of the seedling planting device W and switching between the right and left leveling rotors 14 are performed by the operating lever 24 . A steering handle 22 , a main shift lever 23 , an operating lever 24 , and the like are provided above a control tower 25 positioned in front of the driver's seat 21 . Steps 26 for getting on and off are provided on both the right and left sides of the foot portion of the boarding section 20 so that the passenger can get on and off the boarding section 20 from the lateral sides of the aircraft.

When the operation lever 24 is operated to the raised position, a planting clutch (not shown) is disengaged and the power transmission to the seedling planting device W is cut off, and the lifting hydraulic cylinder 4 is actuated to raise the seedling planting device W. . When the operation lever 24 is operated to the lowered position, the seedling planting device W descends and comes to a state of being in contact with the paddy surface and stopped.

When starting the rice planting work, the passenger operates the operation lever 24 to lower the seedling planting device W and start the transmission to the seedling planting device W to start the rice planting work. When the rice planting work is to be stopped, the operation lever 24 is operated to raise the seedling planting device W, and the power transmission to the seedling planting device W is cut off.

[About seedling planting mechanism]
As shown in FIGS. 3 and 4, a drive shaft 30 is provided across the transmission case 10 and the rotation case 11A, and the drive shaft 30 is configured to be rotatable around a horizontal axis P1 in the lateral direction of the machine body. . The drive shaft 30 protrudes to the left and right sides of the machine body from the transmission case 10, and the left and right ends of the drive shaft 30 are connected to the rotary case 11A so as to be integrally rotatable. That is, the locking pin 31 is interposed between the periphery of the tip of the drive shaft 30 and the rotation case 11A, and the drive shaft 30 and the rotation case 11A are prevented from rotating relative to each other through the locking pin 31. is configured as As a result, the rotating case 11A has a rotating shaft center at the center in the longitudinal direction and is rotatable around a horizontal shaft center P1 in the lateral direction of the machine body.

Cylindrical members 32, 32 are bolted to the left and right ends of the transmission case 10, respectively. The cylindrical member 32 fits on the drive shaft 30 and fits on the inside of the rotary case 11A. A claw portion 32a is formed at the end of the cylindrical member 32 opposite to the side where the transmission case 10 is located. Inside the rotating case 11A, the shaft core gear 33 is fitted onto the drive shaft 30 and meshes with the claw portion 32a. With this configuration, the shaft core gear 33 is fixed to the transmission case 10 so as not to rotate relative to it while being positioned inside the rotation case 11A. The drive shaft 30 is configured so as to be relatively rotatable with respect to the cylindrical member 32 and the shaft core gear 33 while being internally fitted in the cylindrical member 32 and the shaft core gear 33 . Therefore, even if the drive shaft 30 rotates around the horizontal axis P1, the shaft center gear 33 remains stationary. Further, since the drive shaft 30 and the rotary case 11A rotate together, even if the rotary case 11A rotates around the horizontal axis P1, the shaft center gear 33 remains stationary at the horizontal axis P1.

Planting gears 35, 35 are provided at both ends in the longitudinal direction of the rotating case 11A. Further, intermediate gears 34, 34 are provided between the shaft core gear 33 and the planting gears 35, 35 in the rotating case 11A. Each of the intermediate gears 34 , 34 meshes with the shaft core gear 33 .
Further, each of the intermediate gears 34, 34 meshes with the planted gear 35 on the side opposite to the side on which the shaft core gear 33 is located. The planting gears 35, 35 are fitted on the support shafts 35A, 35A, respectively, and the planting gear 35 and the support shaft 35A are engaged by a spline structure so as not to rotate relative to each other. The support shaft 35A protrudes laterally outward from the rotating case 11A, and a connecting flange surface 35B is formed at the protruding end of the support shaft 35A. The connection flange surface 35B of the support shaft 35A and the connection surface 11C of the planting arm 11B are connected by the connection bolt Bo so as not to rotate relative to each other. A portion where the connection flange surface 35B of the rotary case 11A and the connection surface 11C of the planting arm 11B are connected by the connection bolt Bo is hereinafter referred to as a "connection portion C". That is, by connecting the rotating case 11A and the planting arm 11B at the connecting point C with the connecting bolt Bo, the planting gear 35 and the planting arm 11B are aligned with the horizontal axis P2 at both ends in the longitudinal direction of the rotating case 11A. It is configured to be rotatable around. Incidentally, each of the pair of horizontal axis centers P2, P2 is positioned symmetrically with respect to the horizontal axis center P1 and parallel to the horizontal axis center P1.

Although not described in detail, each of the shaft core gear 33, the intermediate gears 34, 34, and the planting gears 35, 35 is configured as an eccentric gear (or a non-circular gear). The rotation speed of the arm 11B periodically increases and decreases according to the rotation angle of the shaft core gear 33. As shown in FIG. As shown in FIG. 4, when the rotary case 11A is driven to rotate about the horizontal axis P1 in the counterclockwise direction in FIG. , the planting gear 35 and the planting arm 11B revolve. At the same time, the shaft core gear 33 and the intermediate gear 34 mesh with each other, causing the intermediate gear 34 to rotate in the direction of arrow B2. In addition, the engagement of the intermediate gear 34 and the planting gear 35 causes the planting gear 35 to rotate in the direction of arrow B3 together with the planting arm 11B. Thereby, as shown in FIG. 4, the planting arm 11B is rotationally driven while drawing a rotational locus F, and the planting arm 11B picks up the seedling from the seedling platform 13. As shown in FIG. At this time, the taken out seedling is clamped by the planting claws 42 . Then, the planting arm 11B plunges into the paddy field to plant the seedlings in the paddy field.

A rotary operation body 36 is fitted onto a portion of the support shaft 35A adjacent to the planting gear 35 in the lateral direction of the machine body, and the rotary operation body 36 and the support shaft 35A are connected by a spline structure so as not to rotate relative to each other. That is, the rotary operation body 36 is configured to rotate integrally with the support shaft 35A around the horizontal axis P2. The rotary operation body 36 is formed in an elliptical shape centering on the horizontal axis P2.
A pair of protrusions are formed along the major axis direction of the ellipse in the rotary operation body 36, and each of the pair of protrusions bulges symmetrically with respect to the horizontal axis P2.

Arms 37, 37 are provided inside the rotary case 11A, and the arm 37 is supported so as to be swingable about a horizontal axis P3 in the lateral direction of the machine body while being in contact with the outer peripheral portion of the rotary operation body 36. As shown in FIG. Incidentally, each of the pair of horizontal axis centers P3, P3 is positioned symmetrically with respect to the horizontal axis center P1 and parallel to the horizontal axis center P1. A coil-shaped spring 38 is provided across the arm 37 and the wall of the rotary case 11A, and the spring 38 is provided in a compressed state in the longitudinal direction. Therefore, the arm 37 is urged to press the outer peripheral portion of the rotary operation body 36 .

A portion of the wall portion of the rotary case 11A that receives the springs 38, 38 is recessed, and at least one of the recessed portions is provided with the oil supply port 11o. The oil supply port 11o is a supply port capable of supplying lubricant to the storage space S2. The rotary case 11A is configured so that lubricating oil can be filled into the rotary case 11A through the oil supply port 11o. The inside of the rotary case 11A is formed as a lubricating oil storage space S1, and the inside of the rotary case 11A is filled with the lubricating oil.

A description of the planting arm 11B is provided below. As shown in FIG. 5, the planting arm 11B is provided with a lower case 40 and an upper case 41, and the lower case 40 and the upper case 41 are connected with bolts. A planting claw 42 is connected to a portion of the lower case 40 opposite to the upper case 41 , and the planting claw 42 protrudes downward from the lower case 40 . The lower part of the lower case 40 is formed in a cylindrical shape extending vertically, and a cylindrical bush 43 is fitted in the inner cylindrical portion of this cylindrical portion. A cylindrical rod 44 is fitted in the inner cylindrical portion of the bush 43 , and the rod 44 is slidable along the longitudinal direction of the planting claw 42 . A lower end portion of the rod 44 protrudes downward from the lower case 40, and a seedling pusher 49 is supported on this lower end portion. The seedling pusher 49 is configured to be in sliding contact with the planting claw 42 and integrally slidable with the rod 44 along the longitudinal direction of the planting claw 42 .

An oil seal and a rubber packing are provided in the lower case 40 below the bush 43 (on the side where the lower end of the rod 44 is located). That is, even if the rod 44 slides, the grease inside the planting arm 11B is received by the oil seal or the rubber packing, and the lower case 40 is designed to prevent the grease from leaking outside the planting arm 11B. is configured.

As shown in FIG. 5 , a flange-shaped spring receiving portion 45 is connected to the upper end of the rod 44 , and the lower end of a coiled spring 46 is received by the spring receiving portion 45 . The spring 46 extends vertically, and the upper end of the spring 46 is received by the inner wall of the upper end of the upper case 41 . A spring 46 is biased to push the rod 44 downward.

The upper part of the rod 44 is connected with the operating arm 47 via the link member 48 . The operation arm 47 is formed in an L shape when viewed from the side, and the bending portion of the L shape of the operation arm 47 is supported swingably by an axial pin 47A.

As shown in FIGS. 3 to 5, the camshaft 50 is rotatably supported with respect to the lower case 40, and is configured to be rotatable around a horizontal axis P2. The cam shaft 50 and the support shaft 35A are separate shafts separated from each other. A cam portion 50a is formed over about half the circumference of the outer circumference of the cam shaft 50, and the base portion 47b of the operating arm 47 and the cam portion 50a are in sliding contact. The cam portion 50a has a portion formed such that the diameter increases toward the clockwise direction along the circumferential direction.

As shown in FIGS. 3 to 5, the pair of planting arms 11B, 11B are provided at both ends of the rotary case 11A with the horizontal axis P1 interposed therebetween. 51 are connected. That is, the pair of camshafts 50 and 50 and the linking member 51 are integrally formed, and the camshaft 50 cannot rotate relative to the linking member 51 . When the rotary case 11A rotates, the linking member 51 rotates around the horizontal axis P1 at the same rotational speed as the rotary case 11A. Further, when the linking member 51 rotates, the pair of camshafts 50, 50 revolves around the horizontal axis P1 and rotates around the horizontal axis P2. Thus, when the rotating case 11A is driven to rotate counterclockwise on the paper surface of FIG. 4, the planting arm 11B revolves around the horizontal axis P1 and rotates clockwise with respect to the rotating case 11A on the paper surface of FIG. rotate around.

5, the cam portion 50a of the camshaft 50 rotates counterclockwise. Therefore, when the base portion 47b of the operating arm 47 rides on the cam portion 50a of the cam shaft 50, the operating arm 47 rotates clockwise in the plane of FIG. do. In this state, the planting arm 11B approaches the lower end of the seedling platform 13 and the seedling is clamped by the planting claws 42. As shown in FIG.

In a state in which the rod 44 slides upward against the spring 46, the arm 37 is pressed against the rotary operation body 36 by the biasing force of the spring 38 inside the rotary case 11A. A portion of the rotary operation body 36 that has passed over the projection in the longitudinal direction abuts the arm 37, and the biasing force of the spring 38 is gradually released. As a result, the biasing force of the spring 46 is offset by the biasing force of the spring 38, so that the rotating case 11A can be rotated smoothly. That is, the operation timings of the rotary operation body 36, the arm 37, and the spring 38 are coordinated so that the biasing force of the spring 38 is exerted as the acting force for withdrawing the seedling pusher 49 against the spring 46. .

When the planting arm 11B enters the paddy field, the cam portion 50a of the cam shaft 50 rotates to the side opposite to the side where the base portion 47b of the operating arm 47 is located. Therefore, the base portion 47b is disengaged from the cam portion 50a, and the rod 44 slides downward due to the biasing force of the spring 46. As shown in FIG. Then, the seedlings are pushed downward from the planting claws 42 by the seedling pusher 49, and the seedlings are planted on the surface of the field. At this time, the operating arm 47 rotates counterclockwise in the plane of FIG. 5 and is received by the rubber body 54 . The rubber body 54 is fixed to the lower case 40 . As the rod 44 is pushed downward, the operation arm 47 rotates counterclockwise in FIG.

As shown in FIG. 5, an opening is formed in the upper end of the upper case 41, and a nut 52 is inserted into this opening. The upper end of the nut 52 is exposed outside the upper case 41 .
A grease nipple 53 is attached to the nut 52 . When a grease gun (not shown) is connected to the grease nipple 53, it becomes possible to inject grease into the planting arm 11B. The interior of the planting arm 11B is formed as a grease storage space S2, and the interior of the planting arm 11B is filled with grease. That is, the inside of the planting arm 11B is a storage space S2 that can store grease as a lubricant. Also, the grease nipple 53 is a supply port capable of supplying the lubricant to the storage space S2.

In this embodiment, the storage space S1 is filled with lubricating oil, and the storage space S2 is filled with grease. Grease has a higher viscosity than lubricating oil.

As described above, the connection surface 11C of the planting arm 11B is positioned at the connection point C, and the connection surface 11C is a portion that opens outside the planting arm 11B in the storage space S2. A gap S3 is provided between the connecting flange surface 35B and the connecting surface 11C. In other words, the connecting portion C where the rotary case 11A and the planting arm 11B are connected is the gap portion S3. A ring-shaped oil seal 55 as a partition member is provided in the gap S3, and the oil seal 55 is configured to prevent grease from leaking from the storage space S2. That is, the oil seal 55 fills the clearance of the clearance portion S3.

As shown in FIGS. 6 to 8, the connection point C has a spigot structure so that the rotation case 11A and the planting arm 11B are engaged, and the support shaft 35A, the connection flange surface 35B, and the connection surface 11C. , are engaged. A part of the support shaft 35A is surface-processed into a cutout shape. This notch-shaped surface-processed portion is hereinafter referred to as a "surface-processed portion K". Of the gaps S3, the gap of the surface-processed portion K is formed larger than the gaps of the other parts of the gaps S3, and this communicating gap forms the "escape portion EW". When a grease gun (not shown) is connected to the grease nipple 53 and grease is injected into the planting arm 11B, the pressure inside the planting arm 11B is increased. The pressure inside the planting arm 11B is also transmitted to the oil seal 55 via the escape portion EW. When the pressure inside the planting arm 11B becomes stronger than the pressing force of the oil seal 55 on the surface-processed portion K, the gap between the surface of the oil seal 55 and the support shaft 35A and the surface of the oil seal 55 One or both of the gap with the connecting surface 11C is expanded. Thereby, the storage space S2 and the outside of the seedling planting mechanism 11 are communicated with each other. The air inside the planting arm 11B escapes through the gap between the escape portion EW and the oil seal 55, and the air inside escapes outside through the gap between the connecting flange surface 35B and the connecting surface 11C. Thereby, the inside of the planting arm 11B is filled with grease.

Furthermore, when the inside of the planting arm 11B is filled with grease and the grease itself is pressurized, the grease continues to pass through the gap between the oil seal 55 and the escape portion EW from which the air has escaped. Then, the grease escapes outside the seedling planting mechanism 11 through the gap between the connecting flange surface 35B and the connecting surface 11C. In this manner, the escape portion EW is configured to allow grease to escape outside the seedling planting mechanism 11 through the oil seal 55 from the gap S3. The relief part EW is formed in the surface-processed portion K of the spigot structure between the rotary case 11A and the planting arm 11B, which is notched in the rotary case 11A. Note that the oil seal 55 is in close contact with the surface of the oil seal 55, the support shaft 35A, and the connecting surface 11C at normal atmospheric pressure (for example, 80 kPa to 120 kPa), and the storage space S2 and the seedling planting mechanism 11 are in contact with each other in the relief portion EW. There is no communication with the outside. Therefore, the oil seal 55 is configured so that foreign matter does not enter the storage space S2 through the oil seal 55 from the outside of the seedling planting mechanism 11 .

The relief portion EW is formed above the vertical central portion of the connecting portion C. As shown in FIG. In this embodiment, the relief portion EW is located on the opposite side of the connecting portion C to the side on which the connecting bolt Bo is located. This makes it easier for the operator to confirm that the inside of the planting arm 11B is filled with the grease when injecting the grease into the planting arm 11B. Thus, the oil seal 55 as a partition member and the relief portion EW are provided in the planting arm 11B.

[Another embodiment]
The present invention is not limited to the configurations exemplified in the above-described embodiments, and other representative embodiments of the present invention will be exemplified below.

(1) In the embodiment described above, the planting arms 11B are provided at both ends of the rotating case 11A in the longitudinal direction, but the present invention is not limited to this embodiment. The planting arm 11B may be provided at one longitudinal end of the rotary case 11A. In short, the planting arm 11B may be provided at the longitudinal end of the rotating case 11A and configured to be able to plant seedlings in the field.

(2) In the above-described embodiment, the configuration in which the gap S3 filled with the oil seal 55 is provided with the escape portion EW is shown, but the present invention is not limited to this embodiment. For example, as shown in FIG. 9, a ring-shaped oil seal 56 is provided in a gap S4 between the drive shaft 30 and an opening in the longitudinal direction of the rotary case 11A, which faces the side of the machine body. can be Further, a configuration in which an escape portion EW is formed at the clearance portion S4 may be employed. Specifically, when a grease gun (not shown) is connected to the oil supply port 11o and lubricating oil is injected into the rotating case 11A, the pressure inside the rotating case 11A is increased. When the pressure inside the rotary case 11A becomes stronger than the pressing force of the oil seal 56, the gap between the surface of the oil seal 56 and the opening of the rotary case 11A, the surface of the oil seal 55 and the drive shaft 30 One or both of the gap between and is pushed wide. As a result, the inside of the rotating case 11A and the outer side of the rotating case 11A may communicate with each other to form an escape portion EW. That is, the oil seal 56 as a partition member and the escape portion EW may be provided in the rotary case 11A.

(3) In the above-described embodiment, the lubricant for the rotating case 11A is lubricating oil, and the lubricant for the planting arm 11B is grease, but the invention is not limited to this embodiment. For example, the lubricant for the rotating case 11A and the planting arm 11B may be grease, or the lubricant for the rotating case 11A and the planting arm 11B may be lubricating oil.

(4) In the above-described embodiment, the surface-processed portion K is formed on the support shaft 35A, but the surface-processed portion K may be formed on the connecting flange surface 35B. Also, the surface processed portion K may be formed on the connecting surface 11C. A relief portion EW may also be formed in the surface-processed portion K other than the support shaft 35A. In short, the relief portion EW may be formed in a notch-shaped surface-processed portion of one or both of the rotary case 11A and the planting arm 11B in the spigot structure between the rotary case 11A and the planting arm 11B. .

(5) The surface processed portion K is formed by metal processing, and the type of metal processing may be milling, reaming, broaching, engraving electrical discharge machining, or the like.

(6) A configuration in which the above-described surface-processed portion K is not formed may be used.

(7) The relief portion EW described above may be formed below the upper and lower central portions of the connecting portions C. As shown in FIG.

(8) In the above-described embodiment, the oil seals 55 and 56 are shown as partition members, but the partition members may be O-rings, breathers, oil seal bearings, seal tapes, or the like.

It should be noted that the configurations disclosed in the above-described embodiments (including other embodiments; the same shall apply hereinafter) can be applied in combination with configurations disclosed in other embodiments unless there is a contradiction.
Moreover, the embodiments disclosed in this specification are merely examples, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the scope of the present invention.

INDUSTRIAL APPLICABILITY The present invention is applicable to a field work machine having a plurality of seedling planting mechanisms capable of planting seedlings in a field.

11: seedling planting mechanism 11A: rotating case 11B: planting arm 11o: oil supply port (supply port)
53: Grease nipple (supply port)
55: Oil seal (partition member)
56: Oil seal (partition member)
Bo: Connection bolt C: Connection point EW: Relief part K: Surface-processed part (notch-shaped surface-processed part)
P1 : Horizontal axis center (body sideways axis center)
S1: Storage space S2: Storage space S3: Gap part S4: Gap part

Claims (12)

A field working machine having a plurality of seedling planting mechanisms capable of planting seedlings in a field,
to each seedling planting mechanism,
a storage space in which the lubricant can be stored;
a partition member provided in a gap opening outside the seedling planting mechanism in the storage space and capable of preventing leakage of the lubricant from the storage space;
a release portion capable of releasing the lubricant from the gap through the partition member to the outside of the seedling planting mechanism ,
The seedling planting mechanism includes a rotating case that has a rotation axis at the center in the longitudinal direction and is rotatable around the lateral axis of the machine body, and a rotating case that is provided at the longitudinal end of the rotating case and is capable of planting seedlings in the field. a planting arm;
The agricultural field working machine , wherein the gap portion is a connecting portion where the rotating case and the planting arm are connected . A supply port capable of supplying the lubricant to the storage space is provided,
The agricultural field work according to claim 1, wherein the partition member is configured to be able to guide the lubricant to the escape portion when the lubricant is supplied from the supply port and the lubricant is pressurized. machine. The connecting part has a spigot structure so that the rotating case and the planting arm are engaged,
The field working machine according to claim 1 or 2 , wherein the relief portion is formed in a portion of the spigot joint structure that is surface-processed in a cutout shape on one or both of the rotating case and the planting arm. . The field working machine according to any one of claims 1 to 3 , wherein the relief portion is formed above a vertical center portion of the connecting portion. the rotating case and the planting arm are connected by a connecting bolt at the connection point;
The field working machine according to any one of claims 1 to 4 , wherein the relief portion is located on the opposite side of the connection portion to the side on which the connection bolt is located. The field working machine according to any one of claims 1 to 5 , wherein the partition member and the escape portion are provided in the rotary case. The field working machine according to any one of claims 1 to 6 , wherein the partition member and the escape portion are provided on the planting arm. The field work machine according to any one of claims 1 to 7 , wherein the lubricant for the rotating case is lubricating oil, and the lubricant for the planting arm is grease. The field work machine according to any one of claims 1 to 7 , wherein the lubricant is lubricating oil. The field work machine according to any one of claims 1 to 7 , wherein the lubricant is grease. A field working machine having a plurality of seedling planting mechanisms capable of planting seedlings in a field,
to each seedling planting mechanism,
a storage space in which the lubricant can be stored;
an oil seal that is provided in a gap opening outside the seedling planting mechanism in the storage space and that can prevent leakage of the lubricant from the storage space;
and a relief portion that allows the lubricant to escape from the gap through the oil seal to the outside of the seedling planting mechanism . A supply port capable of supplying the lubricant to the storage space is provided,
12. The field work according to claim 11, wherein the oil seal is configured to be able to guide the lubricant to the escape portion when the lubricant is supplied from the supply port and pressurized. machine.

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